Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Books

Pitch Diameter Measurement of Threaded Gages Using a CMM

Author(s)
Ralph C. Veale, Edgar G. Erber, Bruce R. Borchardt
The reference datum for a screw thread is the pitch diameter cylinder. Although a defined method within the United states for pitch diameter measurement exists...

Fabrication of Optics by Diamond Turning

Author(s)
Richard L. Rhorer, Christopher J. Evans
The use of special machine tools with single-crystal diamond-cutting tools to produce metal optics is called diamond turning. The manufacture of optical...

NIST Hearing Aid Test Procedures and Test Data

Author(s)
Randall P. Wagner, E D. Burnett
A description is given of the hearing aid testing done for the Department of Veterans Affairs. Emphasis is given to the determination of the insertion frequency...
Was this page helpful?